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International Conference on Advanced electrical engineering (ICAEE)

作者： Abedelfattah Hoggui Khoutir Benkouachi Ali Benachour Mohand oulhadj Mahmoudi Department of Electrical Engineering Ecole Nationale Polytechnique Algiers Algeria Department of Electrical Engineering Ecole Supérieure des Sciences Appliquées Algiers Algeria

ISBN: (数字)9798350349351

ISBN: (纸本)9798350349368

This paper introduces a well-known Direct Torque Control-Space Vector Modulation (DTC-SVM) approach for controlling a five-phase induction motor powered by a two-level, five-phase voltage source inverter. The proposed method employs two Proportional-Integral (PI) controllers to manage flux and torque. To assess the static and dynamic capabilities of the DTC-SVM technique, simulations were conducted using MATLAB/Simulink. Experimental trials were carried out on a custom-built test bench in the LCP laboratory of ecole Nationale polytechnique to corroborate the simulation outcomes and evaluate the actual efficacy of the control system. The DTC-SVM strategy demonstrated robust electrical and electromagnetic performance, adopting a constant switching frequency to mitigate a common issue associated with traditional DTC systems.

关键词： Torque Induction motors Voltage source inverters Biological system modeling Switching frequency Stators Vectors Voltage control Transient analysis Load modeling

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Equivalent Modeling of Multilayered Conductive Composite Materials for EMI Shielding Applications

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IEEE Transactions on Dielectrics and electrical Insulation 2025年

作者： Medjaouri, Youcef Amine Benzaoui, Karim Ales, Achour Rekioua, Badreddine Tahmi, Redouane Peumans, Dries Gyselinck, Johan Rolain, Yves Ecole Militaire Polytechnique Department of Electrical Engineering Algiers16111 Algeria Ecole Nationale Polytechnique Department of Electrical Engineering Algiers16200 Algeria Vrije Universiteit Brussel Department of Fundamental Electricity and Instrumentation Brussels Belgium Université Libre de Bruxelles Electro and Mechanical Systems Department of Bio Brussels Belgium

This paper develops a single-layer equivalent model for multilayered shielding materials using measurements of complex permittivity and permeability. Through rectangular waveguide Transmission/Reflection measurements, electromagnetic parameters and shielding effectiveness (SE) are evaluated. The aim is to establish an equivalent single-layer structure matching the SE of the original multilayered structure. Initial validation involves testing on simulated and experimental data of a reference single-layer material. The methodology is then applied to a novel three-layer PANI-Fe3O4/CNT/PANI-Fe3O4 composite material. Unlike conventional approaches requiring new multilayered material synthesis, this approach combines existing and widely available materials, simplifying characterization and reducing cost and complexity to achieve the desired SE. Comparative analysis with analytical SE values from Transmission Line Matrix (TLM) formulation is conducted using simulated data. The proposed approach is validated within the X-band frequency range using analytical TLM formulation, numerical simulation, and experimental data. The proposed approach exhibits good performance in reconstructing the equivalent model. © 1994-2012 IEEE.

关键词： Conductive materials

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Experimental study on flow characteristics in a new separator 19

Experimental study on flow characteristics in a new separato...

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19th International Conference on Future Networks and Communications, FNC 2024 / 21st International Conference on Mobile Systems and Pervasive Computing, MobiSPC 2024 / 14th International Conference on Sustainable Energy Information Technology, SEIT 2024

作者： Alsafadi, Ibrahim Kharoua, Nabil Meribout, M. Islam, Md. Khezzar, L. Afshin, G. Mechanical Engineering Department Khalifa University of Science & Technology Abu Dhabi127788 United Arab Emirates Mechanical Engineering Department Ecole Nationale Polytechnique de Constantine BP 75 A Nouvelle ville RP Constantine Algeria Electrical Engineering & Computer Science Department Khalifa University of Science & Technology PO. Box 2533 Abu Dhabi United Arab Emirates

The confined multiphase swirling flow characteristics were studied in the presence of a new bluff body for gas/liquid separation. It is a hollow cylinder with a tapered front. The flow visualization was performed using High Speed Camera. The gas-to-liquid ratio was controlled by manipulating the air and water flow rates in the flow loop. Based on previous studies, the generated air core exhibits different regimes with stable and unstable regions along the pipe axis. The proposed bluff body should be placed with the stable region to avoid the loss of separation efficiency due to the oscillations of the air core. Three flow regimes were considered based on the water flow rate. At the low water flow rate, the air core is thinner and breaks down a few centimeters upstream of the bluff body. The generated bubbles are sucked inside the bluff body. Increasing the air flow rates causes the air core to get closer to the bluff body until reaching it completely and might enlarge exceeding the bluff body diameter. For all the cases considered, the air core is wavy with highly instable diameter and length. When increasing the water flow rate, a more stable air core is formed closer to the bluff body. The high-water flow rate appears to be necessary to stabilize the air core and reach flow regimes favorable for an efficient separation through both the annular space and the internal passage. © 2024 The Authors. Published by Elsevier B.V.

关键词： Swirling flow

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Normal and Resilient Mode FPGA-based Access Gateway Function Through P4-generated RTL

Normal and Resilient Mode FPGA-based Access Gateway Function...

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International Workshop on Design of Reliable Communication Networks (DRCN)

作者： Mostafa Abbasmollaei Tarek Ould-Bachir Yvon Savaria Department of Computer and Software Engineering Department of Electrical Engineering Polytechnique Montréal Montreal Canada

ISBN: (数字)9798350348972

ISBN: (纸本)9798350348989

Customizing packet processing is crucial in the evolving network landscape, especially with the rise of 5G telecommunications and beyond. Software-Defined Networking and programmable data planes, powered by the P4 language and FPGA-based platforms, offer dynamic network customization that can be used to implement resilient networks. With their high performance and programmability, FPGAs present cost-effective alternatives for diverse network applications, including offloading packet processing from servers. This paper introduces a configurable FPGA-based data plane implementing the Access Gateway Function (AGF). It offers a resilient operating mode to enhance network reliability and availability. The paper leverages the P4 language and the VitisNetP4 Intellectual Property to create RTL streams, enabling AGF on a pure FPGA target. The reported experimental results demonstrate that the proposed architecture can support 50K user flows with a resource utilization lower than 15% of that available in an Ultrascale+ FPGA (xcu280-fsvh2892-21-e). This leaves massive logic resources available to incorporate fault mitigation techniques and spare streams needed to enhance resiliency. Moreover, the presented workflow maintains an average latency of approximately 9 microseconds for each downstream or upstream packet.

关键词： 5G mobile communication Logic gates Telecommunications Telecommunication network reliability Servers Resource management Software defined networking

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Design and Fabrication of COVID-19 Microstrip Patch Antenna for Wireless Applications

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Progress In Electromagnetics Research C 2022年 118卷 125-134页

作者： Abdaljabar, Jihan S. Madi, Mervat Alhindawi, Asaad Kabalan, Karim Department of Communication Engineering Polytechnique University Sulaymaniyah Iraq School of Engineering Architecture and Interior Design Amity University Dubai United Arab Emirates Department of Electrical and Computer American University of Beirut Beirut Lebanon

This paper presents a novel unique microstrip fractal patch antenna with a COVID-19 shape designed for wireless applications. The COVID-19 antenna is a compact, miniature size, multiband, low weight, and low-cost patch antenna;the demonstrated patch antenna, simulated using the HFSS software program, consists of a circular printed patch with a radius of 0.4 cm surrounded by 5 pairs of crowns. The antenna is implemented on a double-sided copper plate with an FR4-epoxy substrate of 1 × 1 cm2 area and 1.6 mm thickness. This small patch operates and resonates on two frequencies 7.5 GHz and 17 GHz within C and Ku bands, respectively. The simulated and measured gains were respectively 0.8 dB and 0.2 dB at the lower frequency and 2.21 dB and 2 dB at the higher frequency. A coaxial probe feeding method is used in the simulation, and printed prototypes showed excellent consistency between measured and simulated resonance frequencies. © 2022, Electromagnetics Academy. All rights reserved.

关键词： Microstrip antennas

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Ferroelectric AlScN as an Extreme Nonlinear Quantum Material beyond LiNbO3

Ferroelectric AlScN as an Extreme Nonlinear Quantum Material...

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Optica Quantum 2.0 Conference and Exhibition, Quantum 2.0

作者： Liu, Jiangnan Thériault, Pierre-Luc Wu, Wade Wen, Qiannan Kéna-Cohen, Stéphane Kira, Mack Mi, Zetian Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI United States Department of Engineering Physics École Polytechnique de Montréal MontréalQC Canada

Al(Sc)N-based quantum heterostructures exhibit over one order of magnitude enhancement of electro-optic coefficient and second-order susceptibility compared to AlN. Its ultrawide bandgap and extreme stability make it ... 详细信息

ISBN: (纸本)9781957171272

关键词： Aluminum gallium nitride Lithium niobate Q factor Second harmonic generation Silicon nitride Thin films

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A hypothetical comparative evaluation system for arctic indoors

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Frontiers of Architectural Research 2025年第1期14卷 210-223页

作者： Seyed-Amin Tabatabaeifard Jean-Francois Lalonde Marc Hebert Andre Potvin Claude MH.Demers GRAP(Groupe de Recherche en Ambiances Physiques) Ecole d’architectureUniversite LavalQuebecCanada Computer Vision and Systems Lab Department of Electrical and Computer EngineeringUniversite LavalQuebecCanada CERVO Brain Research Centre Faculty of MedicineUniversite LavalQuebecCanada

This research presents an innovative approach to evaluating indoor spaces,combining qualitative attributes with numerical architectural metrics. A hypothetical comparative visualization system is introduced, utilizing HDR visual imaging and thermal imaging in 360° field of view across multiple indoor environments. The study aims to provide architectsand occupants with a user-friendly tool informing them about the primary considerations oftheir built spaces, with a specific focus on indoor environmental qualities in remote Arctic regions. Key inquiries delve into the efficacy of the spherical approach and the capacity ofcomparative visualization to offer insights into space quality. Preliminary experiments contrastindoor environments in terms of circadian lighting, thermal uniformity, and view access tooutside in the 360° field of view (VAR360). The resulting visualizations hold significance inintroducing an immersive approach for depicting specific non-visible environmental qualities,particularly in relation to the window characteristics of spaces. It demonstrates the integration of multiple environmental variables, both steady-state and temporal, from central pointswithin spaces, providing a comprehensive view over their non-visible qualities. These resultsshould be useful for researchers and practitioners within building sciences, computer vision,and photobiology, showcasing an out-of-the-box approach for categorizing indoor spaces basedon standards and human-environmental qualifications.

关键词： Environmental assessment 360°imaging Comparative systems Low-cost tools Built environments

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60 GHz Perforated Dielectric Resonator Antenna Fed By Substrate Integrated Waveguide

60 GHz Perforated Dielectric Resonator Antenna Fed By Substr...

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2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2023

作者： Rahmati, Ehsan Aloi, Daniel N. Sharawi, Mohammad S. Polytechnique Montréal Electrical Engineering Department MontréalQCH3T 1J4 Canada Oakland University Electrical and Computer Engineering Department RochesterMI48309 United States

ISBN: (纸本)9781665442282

This paper presents the design and study of a high gain and wideband perforated dielectric resonator antenna (DRA) fed by a low loss substrate integrated waveguide (SIW) feeding technology at the frequency range of 54-65 GHz. The applied perforated technique improves the bandwidth and the excitation of a higher order mode enhances the antenna gain. The designed antenna shows a peak gain of 8.6 dBi and 18.5% impedance bandwidth. Therefore, it is capable of covering multiple standards as well as have a single element high gain. The proposed DRA can be a good candidate for short-range wireless communications at millimeter wave bands. © 2023 IEEE.

关键词： Substrate integrated waveguides

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Dual-Band Shared Aperture Antenna with a Large Operation Frequency Ratio for 5G Application

Dual-Band Shared Aperture Antenna with a Large Operation Fre...

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Antennas and Propagation & USNC/URSI National Radio Science Meeting

作者： Guillaume Ndjamba Nyami Reza Shamsaee Malfajani Ahmed A Kishk Electrical and Computer Engineering Department Concordia University Montreal QC Canada Electrical and Computer Engineering Department Polytechnique Montreal Montreal QC Canada

ISBN: (数字)9798350369908

ISBN: (纸本)9798350369915

A shared aperture antenna is presented, which covers two widely separated frequency bands, Sub-6GHz and millimeter-wave (Sub-6GHz/mmWave), such as 3.5 and 28GHz. The overall antenna consists of a patch antenna that radiates at 3.5GHz, whereas the $1\times 4$ CDRA (Circular Dielectric Resonator Antenna) array embedded in SIW (Substrate Integrated Wave-guide) radiates at the center frequency of 28GHz. To reduce the aperture antenna area, we use the stack layer technique. The overall dimension of the antenna is $0.73\times 0.34\times 0.027\lambda_{L}^{3}$ , where $\lambda_{L}$ is the low-frequency wavelength. The antenna performance achieves a bandwidth of 9.7%/9.46%, a maximum gain of 5.25dBi/10.5dBi, and an efficiency of 90.9%/88%.

关键词： Patch antennas Millimeter wave technology Resonant frequency Dual band Dielectric resonator antennas Aperture antennas Millimeter wave communication

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Best Practices for Quantum Error Mitigation with Digital Zero-Noise Extrapolation 4

Best Practices for Quantum Error Mitigation with Digital Zer...

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4th IEEE International Conference on Quantum Computing and engineering, QCE 2023

作者： Majumdar, Ritajit Rivero, Pedro Metz, Friedrike Hasan, Areeq Wang, Derek S. Ibm Quantum Ibm India Research Lab India Ibm Quantum Ibm T. J. Watson Research Center United States Institute of Physics Ecole Polytechnique Fédérale de Lausanne Switzerland Center for Quantum Science and Engineering Ecole Polytechnique Fédérale de Lausanne Switzerland Princeton University Department of Electrical and Computer Engineering United States

ISBN: (纸本)9798350343236

Digital zero-noise extrapolation (dZNE) has emerged as a common approach for quantum error mitigation (QEM) due to its conceptual simplicity, accessibility, and resource efficiency. In practice, however, properly applying dZNE to extend the computational reach of noisy quantum processors is rife with subtleties. Here, based on literature review and original experiments on noisy simulators and real quantum hardware, we define best practices for QEM with dZNE for each step of the workflow, including noise amplification, execution on the quantum device, extrapolation to the zero-noise limit, and composition with other QEM methods. We anticipate that this effort to establish best practices for dZNE will be extended to other QEM methods, leading to more reproducible and rigorous calculations on noisy quantum hardware. The full version of this paper can be found in Ref. [1]. © 2023 IEEE.

关键词： Extrapolation

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